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  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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  <script>
    function factorial(n) {
      if (n===1) {
        return 1;
      }
      return factorial(n-1)*n;
    }

    function factorialSum(n) {
      if (n===1) {
        return 1;
      }
      return factorialSum(n-1) + factorial(n);
    }
    console.log(factorialSum(4));
  </script>
</body>
</html>